[leone184]

You can actually use Bondo for this, but it's probably a very small hole, and not worth buying such a large can of material. Besides, you would have to sand the patch after it dries, which means finding paint to match. This could be tricky, the original color has probably faded, and new paint will stand out like a sore thumb unless you cover a large area. Kactuskid's idea of filling it in with caulk will probably save you a lot of time and effort.

leone184